× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1993 Ford Ranger STX 4.0L Excessive Emissions
Posted to Ford Driveability on 5/26/2016 12 Replies

inherited this truck from another shop, failing the ASM testing for NOX and HC's. running a base line test i found that fuel trims are going crazy. at idle im watching my o2 sensors and decided to graph my fuel trim also. bank 1 was switching like an o2 sensor...

12 Replies Received (View Replies)

  Related Documents & Media  1993 Ford Ranger STX

 
Message Closed w/FIX

car Vehicle Data

1993 Ford Ranger STX

VIN 1FTCR10X3P
Engine4.0 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection
SymptomsExcessive Emissions
OccursUnder Load
Message Closed w/FIX

car Vehicle Data

1993 Ford Ranger STX

VIN 1FTCR10X3P
Engine4.0 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFuel Injection
SymptomsExcessive Emissions
OccursUnder Load